Instr – Remote Processing CAMBASIC User Manual
Page 98
Comm ands - 65
INSTR
Function
SYNTAX:
a = INSTR(n,string,substring)
PURPOSE:
Returns the position of the first occurrence on a sub-string within a string.
REMARK S:
The par ameter n spe cifies where the sear ch is to start in the string. A “ 1” signifies the leftmo st
position in the string. This para meter is not optional. Its range is 1 to 252.
string is a string constant or string variable that is to be searched.
substring is the string variable or constant to be searched for.
If n is greater than the length of string or if string is null or if substring cannot be found, INSTR
returns zero. If substring is null, INST R return s n or one.
RELATED:
L E F T $ , R IG H T $ , L E N an d M ID $
EXAMPLE:
10 A$="BOOHOO"
20 B$="HOO"
30 PRINT INSTR(1,A$,B$)
RUN
4
ERROR:
< Illegal argument> – if n < 1